EndRun Tempus LX GPS, User Manual

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T e m p u s L X G P S U s e r M a n u a l 18
C H A P T E R T W O
You have selected multicast operation. Enter the number of hops that
are needed for the multicast packets on your network (positive integer): 1
It is highly recommended that authentication be used if you are using NTP in
broadcast/multicast mode. Otherwise clients may easily be “spoofed” by a fake NTP
server. You can specify an MD5 key number that the Tempus LX GPS will use in its
broadcast/multicast packets. The clients on your network must be configured to use
the same key.
Would you like to specify an MD5 key number to use with
broadcast mode? ([y]es, [n]o) y
Enter the MD5 key number to use (1-65534):
2
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* *
* The Tempus LX GPS Network Time Protocol configuration has been updated. *
* *
* Please re-boot now for the changes to take effect. *
* *
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Configuring the Tempus LX as a Stratum 2 Server
Operating the Tempus LX as a Stratum 1 Server is the recommended mode. You may operate the unit
as a Stratum 2 server but since there are innumerable ways to configure your network with Stratum 2
servers, specific insructions for how to do that are beyond the scope of this manual. General instruc-
tions are that you need to edit the etc/ntp.conf file and then copy it to the /boot/etc directory to make it
nonvolatile.
We advise against using your Tempus LX as anything other than a Stratum 1 server unless you are
knowledgeable about NTP and understand the ramifications. Since the Tempus LX is running stan-
dard NTP compiled from the reference distribution all information in the following link is pertinent:
http://www.ntp.org .
Although all the information is available at the above site, the following are excellent tutorials on set-
ting up NTP and are easier to understand:
http://www.sun.com/solutions/blueprints/0701/NTP.pdf
http://www.sun.com/solutions/blueprints/0801/NTPpt2.pdf
http://www.sun.com/solutions/blueprints/0901/NTPpt3.pdf